package com.example.demo;

import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Bean;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.lang.reflect.Array;
import java.util.Arrays;

@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
    @Bean("initer")
    CommandLineRunner commandLineRunner(ApplicationContext ctx) {
        return args -> {
            System.out.println("由Spring Boot注册的所有Bean:");
            String[] beanNames=ctx.getBeanDefinitionNames();
            Arrays.sort(beanNames);
            for(String beanName:beanNames){
                System.out.println(beanName);
            }
        };
    }
    @RestController
    class HelloController{
        @RequestMapping("hello")
        public String index(){
            return "你好，String Boot!";
        }

    }
}

